Warp threads shedding operation device combined with the weft threads carrying device for circular weaving looms



Nov. 22, 1955 G. CASATI ETAL WARP THREADS SHEDDING OPERATION DEVICECOMBINED WITH THE WEFT THREADS CARRYING DEVICE FOR CIRCULAR wmvmc LOOMSFiled July 5, 1951 10 Sheets-Sheet l I N V EN TORS 6 a 5+0 Oasa-h' Cayaz z am' a.

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Nov. 22, 1955 Filed July 5, 1951 G. CASATI El AL WARP THREADS SHEDDINGOPERATION DEVICE COMBINED WITH THE WEF'I THREADS CARRYING DEVICE FORCIRCULAR WEAVING LOOMS l0 Sheets-Sheet 2 FIG 2 INVENTORS: G-ius-InCascch' BY Carlo Cazzam'qa,

mama s. snafu Nov. 22, 1955 G. CASATI ETAL WARP THREADS SHEDDINGOPERATION DEVICE COMBINED WITH THE WEFT THREADS CARRYING DEVICE FORCIRCULAR WEAVING LOOMS l0 Sheets-Sheet 3 Filed July 3 1951 INVENTORS 1Gm 5+0 CaS arla Cazxczm BY i911.

mm: 5. 5mm.

Nov. 22, 1955 G. CASATI ETAL 2,724,413

WARP THREADS SHEDDING OPERATION DEVICE COMBINED WITH THE WEFT THREADSCARRYING DEVICE FOR CIRCULAR WEAVING LOOMS Filed July 3, 1951 10Sheets-Sheet 4 b INVENTORS! a'iusfo Casanh' F/ 7 BY c v azzqm'ga.

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1955 G. CASATI ETAL WARP THREADS SHEDDING OPERATION DEVICE COMBINED WITHTHE WEFT THREADS CARRYING DEVICE FOR CIRCULAR WEAVING LOOMS l0Sheets-Sheet 5 Filed July 5, 1951 INVENTORS Giusf-o Ca Scvh" Carlo(1211111194,

Macaw s. smmvk Nov. 22, 1955 G. CASATI ETAL 2,724,413

WARP THREADS SHEDDING OPERATION DEVICE COMBINED WITH THE WEFT THREADSCARRYING DEVICE FOR CIRCULAR WEAVING LOOMS Filed July 5, 1951 10Sheets-Sheet 6 B' a W \i I N VEN TORS G' 'USID 'asa-h' Y a r/o Ca zzam'4144mm 5. swim/L qqt- 1955 G. CASATI ETAL WARP THREADS SHEDDINGOPERATION DEVICE COMBINED WITH THE WEFT THREADS CARRYING DEVICE FORCIRCULAR WEAVING LOOMS l0 Sheets-Sheet 7 Filed July 3, 1951 INVENTURfi:

G-ius-fv Casmh' y carlo CaZZQJD'qc Wat/1w 5. Svni/fm aqt 1955 G. CASATIETAL WARP THREADS SHEDDING OPERATION DEVICE COMBINED WITH THE WEFTTHREADS CARRYING DEVICE FOR CIRCULAR WEAVING LOOMS l0 Sheets-Sheet 8Filed July 3 1951 INVENTORJ G us'fo Casad' By Car/o Cazzamljm macaw 55mm Nov. 22, 1955 G. CASATI ETAL 2,724,413

WARP THREADS SHEDDING OPERATION DEVICE COMBINED WITH THE WEFT THREADSCARRYING DEVICE FOR CIRCULAR WEAVING LOOMS Filed July 3, 1951 10Sheets-Sheet 9 INVENTORP @ius'ho Cascrri y Car/o Caz zam'ga/ 4414mm 651714 Kan.

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Nov. 22, 1955- G. CASATI ETAL 2,724,413

WARP THREADS SHEDDING OPERATION DEVICE COMBINED WITH THE WEFT THREADSCARRYING DEVICE FOR CIRCULAR WEAVING LOOMS Filed July 3, 1951 10Sheets-Sheet l0 BY Carlo Cazz Giusto Casati, Barzano, and CarloCazzaniga, Monticello, Italy Application July 3, 1951, Serial No.234,995

Claims priority, application Italy April 28, 1951 12 Claims. (Cl.139-16) The present invention relates to a circular weaving loom andmore particularly to a circular weaving loom having a warp threadsshedding device combined with a weft thread carrying device.

One object of the present invention is to displace the warp threadsduring the weaving operation as little as possible. t

An additional object of the present invention is to support thedisplaced warp threads properly during the weaving operation.

A further object of the present invention is to form the device in sucha way that the warp threads can be easily inserted.

It. is yet another object of the present invention to provide for a loomstopping mechanism in case one of the warp threads is broken during theweaving operation.

It is still another object of the present invention to increase the shedgradually during the weaving operation.

With the above objects in view, the present invention mainly consists ina circular weaving loom comprising a plurality of healds or heddles toefiect guiding and shedding of the warp threads, a box wherein saidhealds are annularly arranged in groups, a warp shedding device formedby a plurality of moving members which are mounted to rotate at the rearpart of said healds so as to exert a pressure thereon to push themforwardly, a warp stop motion means connected to the shedding device forturning movement therewith and including a feeler formed by a bar and byan arm to which the baris secured, the bar being formed with a threadedhole, a screw threadedly engaging the bar in the hole and formed with anaxial bore, a rode extending through the bore, a roller loosely mountedon the rod and positioned so asto engage the rear ends of the healds,the roller having a height which enables it to engage all heald groups,a helical spring wound around the rod, a pin on the rod, a lever engagedby the pin and turnable on the bar of the feeler, the lever beingadapted to close an electric loom stopping circuit, a second spring alsowound around the rod and exerting a pressure on the pin and thus on thelever to maintain the roller against the healds, and a weft spoolcarrying device including a weft carrying carriage, a bent needle havinga V-shaped cross section tapering toward the lower end of the needle toeffect the guiding of the weft thread, and a shed spreader means formoving warp threads from an inner to an outer position at which thepicking is eifected.

The weft carrying carriage of the loom comprises a framework of magneticmaterial, two brackets mounted on the framework, two spindles mountedonthe brackets so as to be able to rotate in their supports, two equalWheels of magnetic material keyed on the spindles, two equal toothedwheels mounted on the spindles, an electromagnetic roller able tosupport and to attract the caran upper bow and a lower bow, bothdesignedto be United States Patent wedged between the warp threads and preciselythe upper bow in advance in respect to the lower bow, in the movementdirection, so that the lower bow may be wedged in only after the gradualincreasing of the shed.

The novel features which are considered as characteristic for theinvention are set forth in particular in the appended claims. Theinvention itself, however, both as to its construction and its method ofoperation, together with additional objects and advantages thereof, willbe best understood from the following description of specificembodiments when read in connection with the accompanying drawings, inwhich:

Fig. 1 is a diagrammatic perspective view showing the overallconstruction of the loom;

Fig. 2 is a partly sectioned top View of Fig. 1;

Fig. 3 is a partly sectioned perspective view showing details of theconstruction in the upper part of the weaving loom to an enlarged scale;

Fig. 4 is a sectioned side view similar to Fig. 3 showing a modifiedconstruction;

Fig. 5 is a partial top view showing healds or heddles in displacedposition;

Fig. 6 is a partial top view similar to Fig. 5 showing a modification;

Fig. 7 is a partial top View of the device showing a modification of thewarp shedding device and the loom stopping mechanism;

Fig. 8 is a left-hand side view of the weft spool carrying device;

Fig. 9 is a top View of the weft spool carrying device;

Fig. 10 is a partial right-hand side view of the weft spool carryingdevice;

Fig. 11 is an overall partly sectioned front view of the circularweaving loom;

Fig. 12 is a partial top view of the device showing one position of theweft spool carrying device in the relation to the healds or heddlesduring the weaving operation; and

Figs. 13 to 15 are top views similar to Fig. 12 showing consecutivepositions of the weft spool carrying device in relation to the healds.

Referring now to the drawings, and more particularly to Figs. 1 and 11of the same, the weaving loom according to the present inventioncomprises a mechanism for the initial shedding motion of the warpthreads 1. 0. located at the upper part of the loom. This mechanismmainly consists in an annular hollow box A in which the healds orheddles M are mounted for a sliding motion in radial direction. Aplurality of discs are arranged inside the box A for moving the healdsM. The loom comprises further a Weft spool carrying device consisting ofa weft carrying carriage C and shed opener means E arranged on bothsides of the weft carrying carriage C. Further provided are means forpropelling the weft spool carrying device and a loom stop mechanismwhich acts in case of a Warp thread breakage. This stop mechanism isshown in Fig; 7.

The mechanism causing the initial shedding motion of the warp threadswill now be described in further detail. The annular hollow box A ismounted by means of a plurality of radial arms a on the hollow driveshaft B for rotation with the same around the shaft axis. The box A(Fig. 11) has an annular top wall 3 to which the free ends of the radialarms a are attached, for instance by screws, an annular bottom wall 4, acylindrical outer wall 1 and an inner wall 2 concentric with the outerwall 1. The four walls are connected together in any convenient mannerfor instance by screws (not shown) or by welding to form a substantiallydust tight box, which may be filled with lubricating material. The outerwall 1 and the inner wall 2 are provided with a plurality of guide holesh (Fig. 3) which are respectively aligned in radial direction in theouter wall 1 and the inner wall 2 for guiding the rear part of thehealds or heddles M for sliding movement in radial direction. The guideholes h are arranged in planes parallel to the top wall 3 and the bottomwall 4, which planes are spaced equally from each other. The guide holesh in consecutive planes are displaced in circumferential direction byequal distances approximately equal to the maximum width of the healdsor heddles M. The warp threads 1. o. guided by healds M are, by thisarrangement, evenly distributed around the circumference of the weavingloom as can be clearly seen from Fig. 1. Each of the healds or heddles Mconsists of a rear part 5 guided in the guide openings h of the annularbox A and this rear part has a cross section slightly smaller than thecross section of the guide openings It so that the healds M can slidefreely within the guide openings. A rectangular cross section ispreferred for the rear parts 5 of the healds M, but any other crosssection preventing turning of the healds'M in their guide openings maybe used. The front part 6 of the healds M is provided with an elongatedeyelet 7, best shown in Figs. 3 and 5, through which the warp threads 1.0. are threaded. The rear part 5 of each heald M extends rearwardlybeyond the inner wall 2 and the free ends of the healds M, when thehealds are in rest position, are aligned on a circle concentric with theinner wall 2, as clearly shown in Fig. 5. For the exact alignment of therear ends of the healds M the rear part 5 of each heald is preferablyformed with an annular boss 9 which abuts in the rest position of thehealds M against the inner face of the inner wall 2 and is pressedagainst this inner face by a spring 8 surrounding the healds M andinserted between the bosses 9 of the same and the inner face of theouter wall 1 (Fig. 4). Arranged rearwardly of the free ends of the rearportions 5 of the heddles M and within the member A are five discs 10,10', 10", 10" and 1N". These discs are equally spaced from each otherand mounted on a shaft parallel to the main shaft B. This shaft ismounted for free rotation on two arms 11, 12 (Figs. 3 and 11) which armsare in turn fastened to a sleeve member G which is concentricallyarranged about the main shaft B. The member G is rotated about this mainshaft in the direction of the arrow R (Figs. l2l5) at a greater numberof R. P. M. than the main shaft by means of a pinion I (Fig. 11) meshingwith an internal gear integrally formed with the member G. The spacingbetween the discs 10, 10', 10", 10', 10 is twice the spacing between theplanes in which the healds M are arranged and the discs respectivelyengage the inner free ends of the healds M so that the healds arrangedin every second of the above mentioned parallel planes are engaged andmoved in outward direction as the discs rotate in the directionof thearrow R about the central axis of the loom. By this displacement of thehealds M the initial shedding b is obtained as 'shown in Fig. 3. After adisc leaves a heald M, the latter is returned to its initial restposition by the spring 8. The spring may also be omitted and in thiscase the heald M is returned to its rest position by the increasedtension of the displaced warp thread or the discs may be magnetized sothat they pull the healds M back to the rest position as they leave thefree ends of the healds.

Instead of forming the outer portion 6 of the healds with an eyelet asdescribed above the outer portion may be formed with a thin blade 7' asshown in Fig. 6. In this case the warp threads 1. 0. are guided betweenconsecutive side faces 7" of the blades 7' and they are displacedoutwardly by the inclined faces 7 when the respective heald is displacedas described above. With this arrangement the warp threads have not tobe threaded through eyelets in the healds which greatly simplifies theoperation of the loom.

Instead of using round discs as shown in Figs. 3 and 11 star-shapeddiscs 1012 may be provided, having a plurality of radially arranged arms10a formed thereon which engage the free inner ends of the healds M.Each of these discs instead of being free to rotate on their spindle mayalso be driven so as to roll its star-shaped surface on the free innerends of the healds M and thus exert a push in a predetermined sequence.Such an arrangement is shown in Fig. 7 in which only the uppermost ofthe star-shaped discs is shown, whereby it is to be understood that aplurality of discs are provided spaced and mounted in a similar manneras the discs shown in Fig. 11.

Fig. 7 shows also the warp stop motion means, that is the mechanism forstopping the loom in case of warp thread breakage. This stopping deviceconsists of an arm 13 extending in lateral direction from the arm 11.This arm 13 is provided near its free end with a threaded openingtherethrough and a hollow screw 14 is threaded through this opening. Arod 15 passes through the hollow-screw 14 and is guided therein forsliding motion. A roller 16 is pivotally mounted on one of the free endsof the rod 15 and engages the inner free ends of the healds M. Theroller 16 has to be made long enough so that it will consecutivelyengage all healds M as the device is rotated about the main axis of theloom. A pin 19 extends from the rod 15 at the location between thehollow screw 14 and the roller 16. This pin 19 engages in a slot formedat one end of a double-armed lever 20 which is pivotally mounted at 21on the arm 13. A coil spring '23 is wound around the rod 15 abuttingwith its ends, respectively, against screw 14 and the pin 19 and pushingthe rod 15 and the roller 16 attached thereto against the free innerends of the healds M and tending to push the'healds M outwardly. Thesehealds are held as mentioned before in their rest positions by the forceof springs '8 or by the tension in the warp threads f. 0. orrespectively by a combination of these two forces and the-force tendingto push the rod 15 outwardly should not be greater than the combinationof the above-mentioned forces. Only when one of the warp threads isbroken and the forces preventing the outward movement of the rod 15 arethereby reduced, the rod 15 should be allowed to move in outwarddirection. For the exact adjustment of the force acting on the rod 15 inoutward direction another coil spring 17 is provided which is woundabout the other end of the rod 15 and abuts on one side against theother end of the screw 14 and on the other side against a nut 18 screwedon the free end of the rod 15. By adjusting the nut 18 the force of thespring 17 can be varied to counterbalance the force of the spring 23 to'a greater or lesser degree. The force of the spring 23, on the otherhand, can also be adjusted by adjusting the position of the hollow screw14. When due to the breakage of one of the warp threads 1. o. the roller16 can move forward under the action of the spring 23, the double-armedlever will tilt about its pivot 21 and the rear end of this lever willabut against the stationary electrical contact 22 and close anelectrical circuit which, 'in turn, will cause the stoppage of the drivemotor of the loom.

Referring now to Figs. 8 to 15, the means for propelling the weft spoolcarrying device and the weft spool carrying device itself including theweft carrying carriage C and the means for opening the shed beyond thepoint obtained by the initial shedding device shall now'be described infurther detail.

The means for propelling the weft spool carrying device comprise amagneticroller 24 keyed to shaft 26 which is turnably mounted on thearms 25 extending in radial direction from the sleeve member G (Fig.11). The roller 24 will rotate about the axis of the main shaft of theloom in the direction of the arrow R together with the sleeve member G.A bevel gear D is fixedly mounted on thehollow shaft B and this bevelgear meshes with .the smaller bevel gear 24' fixedly mounted on theshaft 26 ofthe roller 24. Thevroller .24 will therefore rotate about itsown axis while the whole weft spool spectively,

the smooth surface of the wheels.

rotation on stud shafts carrying device rotates about the main axis ofthe loom. A thrust roller bearing k is conveniently provided between theupper face of the mounting boss of the bevel gear D and the lower faceof the member G to reduce the friction between these two members whichrotate, as mentioned before, at different speeds. A second roller 28 ofa diameter smaller than the roller 24 is mounted for rotation on a shaft29 which, in turn, is mounted on two arms 27 extending under an anglefrom the two arms 25. The arrangement is made in such a way that theroller 28 will trail the roller 24 when the device is rotated in thedirection of the arrow R.

The weft spool carrying device comprises the weft carrying carriage Cwhich has a supporting plate or frame work 30 of magnetic material fromwhich two brackets 31 and31' extend in a direction substantially normalto the plate 30. These brackets and brackets 44 and 45, re-

support two spindles 32 and 33 for free rotation. Two wheels 34 and 35of equal diameter and formed from magnetic material are 32 and 33,respectively. Two rings 36 and 37 of nonmagnetic material and having awidth smaller than the Width of the wheels 34 and 35 are respectivelytightly fitted on these wheels so that they project slightly from Theweft carrying carriage C comprises further a wheel 38 of a diametersmaller than the diameter of the two wheels 34 and 35. This wheel 38 isalso formed from magnetic material and is mounted for free rotation onits spindle 39 which in turn is mounted on a bracket 40 extending fromthe plate 30 near the bracket 31. Wheel 38 is mounted in relation to thewheel 34 in such a way that the wheel 34 will trail the wheel 38 whenthe device is rotated in the direction of the arrow R. A toothed wheel46 is keyed to the free end of the spindle 32 extending beyond thebracket 44 and this toothed wheel meshes with a pinion 48 which is keyedto spindle 50 and has a diameter slightly smaller than the wheel 46.Keyed to the spindle 50 is also a pulley 52 and a belt is wound aroundthis pulley and smaller pulleys 56 and 58 mounted for free fixedly.connected to the plate 30.

A similar arrangement of gears, pulleys and belts is made on the lowerpart of the plate 30. A toothed wheel 47 is keyed to the shaft 33 of theroller 35 and this toothed wheel meshes again with a pinion 49 of aslightly M wheel 47.

pulley 53 and a belt 55 is wound in form of a around this pulley 53 andsmaller pulleys 57 and 59 mounted in the pair of smaller pulleys mountedfor free rotation on stud shafts. Bow-shaped members 60, 60 aremountedon the plate 30 substantially perpendicular to the same and locatedrespectively adjacent thebelts 54 and 55. The front ends of thesebow-shaped members 60, 6 9' are pointed in the direction of rotation ofthe weft spool carrying device and are located on this device in such away that the pointed ends will enter into the initial shed of the warpthreads when the device is rotated about the main axisof the loom.

The weft carrying carriage C is further provided with closed loopsection and is tapered at its lower end and guides the weft threadduring the weaving operation to the apex keyed to the spindle machine bythe means described above the roller 24 will rotate in the direction ofthe arrow X and the roller 28 in the same directions indicated by thearrow X. The wheels 34 and 35 attracted to the roller 24 by magneticinduction will therefore rotate in the direction of the arrow Y. Thepulleys 52 and 53 driven respectively over the pinions 46, 48 and 47, 49will thereby rotate in the direction of the arrow Z. The belts 54 and 55respectively wound over the pulleys 52 and 53 and the small pulleysassociated therewith move therefore in the direction of the arrow Z.

The warp thread is brought to the initial shed position by the healds Mand the members associated therewith as described above permitting theweft carrying carriage C to be passed through the shed for efiecting thepicking whereby the warp threads are displaced further in radialdirection by the bow-shaped members 60, 60. There occurs no displacementof the warp threads in circumferential direction as the weft carryingcarriage C is moved about the main axis in the direction of the arrow Rwhereas the rollers 24 and 28 and the wheels 34 and 35 rotate in adirection opposite to the direction R and the device is designed in sucha way that the surface speed of these rollers and wheels is the same asthe speed with which the whole device rotates about the main axis. Thesame holds true for the belts 54 and 55 which move also in a directionopposite to the direction indicated by the arrow R with a surface speedequal to the speed with which the carriage C is rotated.

The gradual displacement of the warp threads in radial drection isclearly shown in the Figs. 12 to .15 which illustrate consecutive stepsin the weaving operation. As can be clearly seen from these figures, thedisplacement of the warp threads occurs very gradually so that thesethreads are stressed as little as possible during the weaving operation.The displaced warp threads are also properly supported during thedisplacement by the belts 54 and 55.

The device for shedding of the warp threads 7. 0. operates in a similarway in the upper and the lower part of the weft spool carrying device.The only difference between the upper shedding device shown in Fig. 8and the lower part illustrated in Fig. 10 is that the bow-shaped member60 is made longer than the bow-shaped member 6t). The two members aredesigned in this way because the member 60 is located as can be seenfrom Fig. 1 just below the box A in which the healds M for the locatedand the pointed end of the bow-shaped member 60 can therefore enter intothe initial shed b. The lower bow-shaped member 60 is located near thepicking apex where the shed b is nearly zero. Consequently, thebow-shaped member 60' finds in the beginning of the weaving operation noopening into which it can wedge itself. Only after the initial shed b isincreased by the bow-shaped member 60 and the belt 54 associatedtherewith the shedding is increased far enough so that the lowerbow-shaped member 60 also enters the shed. If desired, the lowerbow-shaped member 60 may be extended by a suitable shaped portiontowards it will be understood that each of the elements described above,or two or more together, may also find a useful application in othertypes of circular weaving looms difiering from the types describedabove.

While the invention has been illustrated and described as embodied in acircular weaving loom having a warp threads shedding operation devicecombined with the weft thread carrying device, it is not intended to belimited and 35 will thereby be attracted to the details shown, sincevarious. modifications. and structural changes may. be made withoutdeparting in any way from the, spirit of the present invention.

Without further analysis, the foregoing will so fully reveal the gist ofthe present invention that others can by applying current knowledgereadily adapt it for various applications without omitting featuresthat, from the standpoint of prior art, fairly constitute essentialcharacteristics of the generic or specific aspects of this. inventionand, therefore, such adaptations should and are intended to. becomprehended within the meaning and range of equivalence of thefollowing claims.

What is claimed as new and desired to be secured by Letters Patent is:

1'. In a circular weaving loom,,1n combination, a plurality of healds toeffect guiding and shedding of the warp threads, a box wherein saidhealds are annularly arranged in groups, a warp shedding device formedby a plurality of moving members which are mounted torotate at the rearpart. of said healds so as to exert a pressure thereonto push themforwardly, a warp stop motion means connectcd to said shedding devicefor turning movement therewith and including a feeler formed by a barand by an arm to which said bar is secured, saidbar being formed with a.threaded hole, a screw threadedly engaging said bar in said hole andformed with an axial bore, a rod extending through said bore, a rollerloosely mounted on said rod and positioned so as to engage the rear endsof said healds, said roller having a height which enables it to engageall heald said rod, a pin on said rod; a lever engaged by said pin andturnable on said bar of said feeler, said lever being adapted to closean electric loom stopping circuit, a second spring also wound aroundsaid rod and exerting a pressure on said pin and thus on said lever tomaintain said roller against said healds, and a weft spool carryingdevice including a weft carrying carriage, a bent needle having aV-shaped cross section tapering toward the lower end of said needle toeffect the guiding of the weft thread, and a shed spreader means formoving warp threads from an inner to an outer position at which thepicking is eliected.

2. In a loom as defined in claim 1, said healds each being formed by arod provided with an extending portion of reduced cross section whichterminates with a long, narrow eyelet the size of which corresponds tothe thread count. 7

3. In a loom as defined in claim 1, said healds being formed by a rodhaving an extending portion of reduced cross section ending with astraight and thin steel blade forming a side face which guides the Warpthread in cooperation with the similar side face of the succeedingheald, and so on through an entire circle of healds.

4. In a loom as defined in claim 1, said carriage comprising a frameworkof magnetic material, two brackets mounted on said framework, twospindles mounted on said brackets so as to be able to rotate in theirsupports, two equal, wheels of magnetic material keyed on said spindles,two equal toothed wheels mounted on said spindles, an electromagneticroller able to support and to attract the carriage. a smaller wheel ofmagnetic mate rial rotatably mounted on its spindle and positioned inthe groups, a helical spring wound around I:

upper part of said carriage in order to face said electromagneticroller, an upper bow and a lower bow, both designed to be wedged betweenthe warp threads and precisely the upper bow in advance in respect tothe lower bow, in the movement direction, so that the lower bow may bewedged in only after the gradual increasing of the shed.

5. In a loom as defined in claim 4, said shed spreader means comprisingtwo pinions respectively engaging said toothed wheels and beingrotatable on their spindles, two pulleys respectively keyed to thelatter, two rollers loosely mounted on their spindles, and two beltsarranged on said pulleys and on said rollers so as to define two closedpaths, whereby a gradual continuous spreading of the warp threads isperformed upon rotation of said magnetic wheels.

6. in a loom as defined in claim 1, the moving members of said sheddingdevice being in the form of star-shaped wheels which are turned so as tounwind on healds to exert a push thereon.

7. In a loom as defined in claim 1, said moving members of said sheddingdevice being magnetized and operating by magnetic attraction on saidhealds to return thelatter to their initial position.

8. In a loom as defined in claim 1, said healds being returned to theirnormal position by the resilience of the warp threads which exert a pushon the healds.

9. In a loom as defined in claim 1, the lower part of said shed spreadermeans being formed by a suitably shaped and extending'bow piece.

10. In a loom as defined in claim 1', said moving members being in theform of discs.

11'.'In a loom as defined in claim 1, and wherein a means for returningsaid healds to their initial position is formed by a plurality ofsprings respectively connected to said healds.

12. In a circular weaving loom, in combination, a main loom shaft; afirst magnetic roller parallel to said main loom shaft, spaced therefromand mounted for rotation about the same on the inside of the warpthreads of the loom; a carriage; a second magnetic roller mounted onsaid carriage adjacent to said first magnetic roller to be attracted toand supported thereby for turning movement therewith about said mainshaft, whereby said carriage turns with said second roller about saidmain shaft; and at least one substantially pointed member extendingforwardly from said carriage in the direction of rotation thereof withsaid first roller to effect spreading of the warp threads.

References Cited in the file of this patent UNITED STATES PATENTS1,416,344 Feuerstein May 16, 1922 1,930,371 Sery Oct. 10, 1933 2,063,734Hale et al. Dec. 8, 1936 2,433,824 Ancet Jan. 6, 1948 2,454,146 ExbelentNov. 16, 1948 FOREIGN PATENTS 395,332 Great Britain Oct. 9, 1931 487,202Great Britain June 16, 1938 606,352 Great Britain Aug. 12, 1948

